THE WOODLANDS, Texas–(BUSINESS WIRE)–NPK International Inc. (NYSE: NPKI) (“NPK” or the “Company”) today announced that it will issue first quarter 2026 results after the U.S. markets close on Thursday, April 30, 2026. A conference call will be held the following day on Friday, May 1, 2026, at 9:30 a.m. ET to review the Company’s financial results and conduct a question-and-answer session. A webcast of the conference call and accompanying presentation materials will be available in the Investo